Sucker-bod ob pull-bod cotipliuo



W. 1. SHELDON AND 0. H. ALLEN.

SUCKER ROD 0R PULL ROD COUPHNG.

APPLSCATION HLED JUNE 1. 1917.

1,305,31 1 H Patented June 3, 1919.

Jnvwntow 9.1,] 5HELDON$ CH/YLLM Elm-o: 11 11 a A UNITED can s- WARD J. SHELDON AND enemies n. ALLEN, or ntno'rna, TEXAfi.

SUCKEE-EOD 0R PULL-120D CGUPL IE'G.

Specification of Eetters Patent.

Patented June 3, 1919.

Application filed June 1, 1917, Serial no. 172,312..

ing to be a full, clear, and exact description I of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. v

This invention relates to an improvement in couplings and is" directed more'particularly to a coupling for securely connecting together those sections of rod or pipe which I when assembled constitute what is known as the pull rod in well drilling operations.

An object of the present invention resides in the provision of a coupling of this character wherein the elements thereof may be conveniently connected and disconnected,

'means of novel arrangement being provided for releasably securing the coupling in assembled position.

\Vith the above and other objects oi: similar nature in view the invention conslsts 1n the construction, combination and arrangement of parts, set forth in and falling within the scope of the appended claims.

In the drawing: Figure 1 is an elevational view of an as sembled coupling constructed in accordance with the invention, one member of the coulmg being shown in sectmn as indicated oy the line 1-1 of Fig. 3.

Fig. 2 is alongitudinal sectional view therethrough.

Fig. 3 is a transverse section taken on the line 33 of Fig. 1, and,

Fig. 4 is a fragmental perspective view of the coupling with the locking member with-' drawn,

Fig.6 is a section taken on the line 5-5 of Fig. 2,

F'g. 6 is a fragmental perspective view .of one member of the coupling, and

ried respectively by the sections 5 andfi, the element '9 bein' of cylindrical formation and provided with a 1011 itudinally extendmg bore 11. Provided in the bore 11 are a plurality of spaced circumscribing series of lugs 12 the longitudinal side faces of which are tapered or beveled inwardly as shown at 13 on radial. lines.

The element 10 of the coupling 'is of' a diameter to pass freely into that portion of the bore of the element 9 inwardly of the lugs 12. and is exteriorly provided with a plurality of spaced circumscribing series of lugs 14; corresponding to the lugs 12 and having their longitudinal faces beveled or tapered similarly thereto as shown at 15. In connecting t e elements 9 and 10, the latter is inserted into the former in such manner that the lugs 14 will enter and pass through the spaces 12 between the lugs 12,

the elements being then rotated relatively to each other to bring the lugs 14: behind and in alinement with the' lugs 12. Thisconstruction constitutes in effect a bayonet joint or connection, the spaces between adjacent lugs in a series corresponding to the slot of such connection and those between each series of lugs corresponding to the transverse slot of the connection,-while the lugs 14: correspond to the pins or lugs of the connection. It is evident that when so interlocked the elements 9 and 10 will be held positively against relative longitudinal movement.

In order to secure the coupling elements against relative rotation and consequent disconnection there is slidably engaged upon the element 10 a sleeve 16 which is splitlongitudinally as shown at 17 for the reception of a guide rib l8 fixed to the ele-. ment 10, the sides of the split engaging.

those of the rib so that rotation of the sleeve with respect to the element 10 will me] faces of which are beveled as at 26 to enter the spaces 12 between the lugs 12 and the spaces 14 between the lugs 14 when the same are disposed in alincmentas above described, the fingers assing into -said spaces as clearly shown in Fig. 2 and positively preventing entry of the lugs thereinto,

so that relative rotation of the elements is in consequence impossible. While not essential to the effective operonre assembled will be positively held against tllSCOlUlECtiOI] while when it, de sired to disassemble the coupling this may be quickly and conveniently accomplished as will be readily understood.

What we claim is:

-l. A coupling" for sucker rods or pull "eds comprising a member having a longi dine! bore and havi i on the inner fare "ii-Of, a series of spaced cireumscribing 1 s providing eoinnmnicating longitudinal "and t ansver; :lots another member adapt to enter said bore and provided with a of peripheral spaced eircmns 'ibing "tags slid'ahle first into the longitudinal slots did then into the transverse slots, a sleeve on the second member to abut the first menn and conform thereto, said sleeve having sed longitudinal locking fin. s ioiit in pile lor dudmai slots vvlien the in are in.

alineinent longitudinally, a guide ii) on. the second member and ha ing a notrh therein, said sleeve being split long'uiulinallv to re" scribing lugs of tapered cross section movable into the longitudinal slots and then into the transverse slots of the first member, a

series of spaced longitudinal fingers mov able into the'longitudinal slots when the lugs a l a n l l I l i ceive the guide rib therein, and a split ring sa are in 'alinement longitudinally so -as intereept said lugs and transverse slots, said lingers also being, of tapering cross section 'iperate with said lugs whereby to 'y fitthe bore of the first member and as carried by said fingers and engagealue with the second member to hold said parts against relative turning and prevent. longitudinal displacement of the fingers.

in. testimony whereoit'wve allix our signaturns; in the presence of two Witnesses. 7'

WARD J. SHELDON. CHARLES H. ALLEN Ffitnesses:

li. ll, lnmvsg. Am. lilmWXlNG. 

